Shock is divided into the early, middle and late stages of shock, the stages in which are different, and the clinical features that are manifested are also different. Early in addition to the clinical characteristics of the original disease, mainly manifested as irritability, anxiety, the patient is very nervous, clear, breathing, pulse may increase, blood pressure may be normal or slightly high, is caused by tension, so the early stage is these manifestations. After the middle stage, the patient gradually becomes unconscious, breathing becomes very slow, pulse is weak, blood pressure may start to decrease, systolic blood pressure is below 50 mmHg or cannot be measured, and urine volume also starts to decrease at this time. In the late stage, the main manifestations are multi-organ failure and DIC, which may manifest as intractable hypotension, extensive bleeding in the skin, and microcirculatory stasis in the nail bed; DIC and multi-organ failure co-exist, and the patient may gradually develop respiratory failure, heart failure, renal failure, and even liver failure.